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1981 IEEE MTT-S International Microwave Symposium Digest最新文献

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Microstrip Loop Radiators for Local Hyperthermia 局部热疗用微带环形散热器
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129963
I. Bahl, S. Stuchly, J. Lagendijk, M. Stuchly
{"title":"Microstrip Loop Radiators for Local Hyperthermia","authors":"I. Bahl, S. Stuchly, J. Lagendijk, M. Stuchly","doi":"10.1109/MWSYM.1981.1129963","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129963","url":null,"abstract":"Two new microstrip radiators for inducing local hyperthermia designed to operate at 433 MHz and 915 MHz are described. Empirical design methods and experimental results obtained with phantoms are presented. The radiators have a desired uniform radiation pattern and are well matched to the muscle tissue or a water bolus.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116347055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Microwave Modelling of H. F. Antennas Over Lossy Earth 含损地球上高频天线的微波建模
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129831
H.B. Jacard, G. G. Gomez
{"title":"Microwave Modelling of H. F. Antennas Over Lossy Earth","authors":"H.B. Jacard, G. G. Gomez","doi":"10.1109/MWSYM.1981.1129831","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129831","url":null,"abstract":"The dielectric constant and loss tangent values of several mixtures of sand, water and salt are measured at 9.3 GHz, in order to investigate the feasibility of microwave modelling of H.F. antennas which operate over imperfectly conducting ground. A particular mixture is used for modelling a monopole antenna over a circular metal disk which is lying on a lossy half-space. Good agreement between theoretical and experimental results is obtained for both input impedance and radiation pattern as a function of the radius of the ground system.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129894411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Continuously Variable Ku-Band Phase/amplitude Control Module 一种连续可变ku波段相位/幅度控制模块
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129952
Y. Gazit, H. C. Johnson
{"title":"A Continuously Variable Ku-Band Phase/amplitude Control Module","authors":"Y. Gazit, H. C. Johnson","doi":"10.1109/MWSYM.1981.1129952","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129952","url":null,"abstract":"A Ku-band microstrip phase shifter capable of continuous phase and amplitude control is described. Three dual-gate FET amplifiers provide variable amplitude vectors that are separated by 120/spl deg/ and summed through an arrangement of quadrature couplers. The described phase shifter provides a full 360/spl deg/ shift with an amplitude weighting capability of more than 20 dB.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132413497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
A Generalized n-Port Cascade Connection 广义n端口级联连接
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129978
G.R. Simpson
{"title":"A Generalized n-Port Cascade Connection","authors":"G.R. Simpson","doi":"10.1109/MWSYM.1981.1129978","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129978","url":null,"abstract":"An extension of the common two-port cascade connection to a generalized n-port cascade connection is described. An efficient matrix algorithm is then derived which computes the S-parameters of the resulting network from the S-parameters of the two connected networks.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130917399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 53
Finite-Difference Method for the Arbitrary Cross-Section Waveguide Problem Using the Best-Fit Boundary Approximation 用最佳拟合边界逼近求解任意截面波导问题的有限差分法
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129825
P. Rozenfeld, L. Mello, A. Filho
{"title":"Finite-Difference Method for the Arbitrary Cross-Section Waveguide Problem Using the Best-Fit Boundary Approximation","authors":"P. Rozenfeld, L. Mello, A. Filho","doi":"10.1109/MWSYM.1981.1129825","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129825","url":null,"abstract":"The finite-difference method is a numerical technique which accuracy strongly depends on the precision of the reconstruction of the boundary of a waveguide. Usually the figure is reconstructed either by an outside or an inside approximation, or by using a much more complex method of unequal-arm finite-difference operator. This paper describes a computer program which maintains the simplicity of the usual finite-difference method and which uses the best-fit approximation to the cross-section of a waveguide. As a result a better precision is obtained and smaller computer time is used in the solution of the dominant mode of the hollow homogeneous waveguide problem. Computed values of the cutoff frequencies for several waveguides are presented.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"313 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122495589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Horn Image Guide Leaky-Wave Antenna 喇叭导像漏波天线
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129806
T. Trinh, R. Mittra, R. J. Paleta
{"title":"Horn Image Guide Leaky-Wave Antenna","authors":"T. Trinh, R. Mittra, R. J. Paleta","doi":"10.1109/MWSYM.1981.1129806","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129806","url":null,"abstract":"A novel approach for designing a frequency-scanning millimeter-wave antenna is described. The antenna is constructed by using an image wide leaky-wave antenna embedded in a long trough with metal flares along both sides. The optimum flare angle for achieving maximum gain is theoretically predicted. The design of the leaky-wave antenna, which is comprised of metallic-strip perturbations on top of a dielectric guide, is also discussed.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121270874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
2-18 GHz, High-Efficiency, Medium-Power GaAs FET Amplifiers 2-18 GHz，高效率，中功率GaAs场效应管放大器
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129810
S. Nelson, H. Macksey
{"title":"2-18 GHz, High-Efficiency, Medium-Power GaAs FET Amplifiers","authors":"S. Nelson, H. Macksey","doi":"10.1109/MWSYM.1981.1129810","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129810","url":null,"abstract":"A GaAs FET amplifier using a 600 mu m gate width device has achieved ~ 300 mW output with 20-25% power-added efficiency across 2 to 18 GHz. With a 1350 mu m FET, 0.5 W output power was obtained from 7 to 16.5 GHz. Extending its large-signal performance to 2 GHz appears feasible.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115364567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A 4.5 W, 26 dB Gain FET Power Amplifier at Ku-Band 一个4.5 W, 26 dB增益的ku波段场效应管功率放大器
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129844
V. Sokolov, R. Bennett
{"title":"A 4.5 W, 26 dB Gain FET Power Amplifier at Ku-Band","authors":"V. Sokolov, R. Bennett","doi":"10.1109/MWSYM.1981.1129844","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129844","url":null,"abstract":"Recent results are presented in the development of multi-stage GaAs FET power amplifiers operating in the 12 to 16 GHz frequency band. Microstrip circuit level power combining is used to achieve 4.5 W output power with 26 dB gain at 13.3 GHz with an efficiency of 15.8%, and a 1 dB bandwidth of 1.7 GHz.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"480 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Asymmetric Microstrip DC Blocks with Rippled Response 具有纹波响应的非对称微带直流块
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129905
D. Kajfez, S. Bokka, C.E. Smith
{"title":"Asymmetric Microstrip DC Blocks with Rippled Response","authors":"D. Kajfez, S. Bokka, C.E. Smith","doi":"10.1109/MWSYM.1981.1129905","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129905","url":null,"abstract":"A design procedure is described for dc blocks using asymmetric coupled microstrip which exhibit a rippled frequency response, while at the same time acting as impedance transformers. Lumped capacitances are added in order to compensate for the difference in propagation constants of two quasi TEM modes.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130229274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Experimental Characterization of Fin Line Discontinuities Using Resonant Techniques 用共振技术实验表征鳍线不连续
1981 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1981-06-15 DOI: 10.1109/MWSYM.1981.1129837
W. Hoefer
{"title":"Experimental Characterization of Fin Line Discontinuities Using Resonant Techniques","authors":"W. Hoefer","doi":"10.1109/MWSYM.1981.1129837","DOIUrl":"https://doi.org/10.1109/MWSYM.1981.1129837","url":null,"abstract":"The equivalent circuit parameters of inductive strips and of impedance steps in unilateral fin line are presented. They have been obtained from the measured resonant frequencies of a rectangular cavity containing these circuit elements.","PeriodicalId":120372,"journal":{"name":"1981 IEEE MTT-S International Microwave Symposium Digest","volume":"1998 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123788214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
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